Vickers Indentation Curves of Magnesium Oxide (MgO)

Loubet, Jean‐Luc; Georges, J. M.; Marchesini, O.; Meille, G.

doi:10.1115/1.3260865

Cited by 378 publications

(133 citation statements)

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“…The nanoindentation principle relies on the continuous measurement of force and displacement as an indenter, of known geometry, is pressed into a sample material. [6][7][8][9][10] The force is usually applied via an electromagnet, in which case the current in the coil determines the load, or by a piezoelectric load cell where the inherent inaccuracies in such a system are corrected by interferometry. The displacement is measured, in most cases, by a capacitive sensor.…”

Section: Introductionmentioning

confidence: 99%

Influence of deposition parameters on mechanical properties of sputter-deposited Cr₂O₃ thin films

1999

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Among the oxides, Cr 2 O 3 exhibits the highest hardness value and a low coefficient of friction. These properties make chromium oxide an excellent coating material for tribological applications. Cr 2 O 3 thin films were deposited by radio-frequency reactive magnetron sputtering at substrate temperature in the range 363-593 K. The hardness and elastic modulus of the films were measured by two complementary nanoindentation techniques to investigate the influences of the substrate temperature and the oxygen content in the sputtering gas. While the continuous stiffness data method provides information throughout the whole film thickness, nanoindentation combined with scanning force microscopy of the residual imprints allows visualization of pileup, cracking, and delamination from the substrate. Hardness values up to 32 GPa were obtained for substrate temperatures exceeding 500 K and oxygen contents between 15% and 25% of the total gas pressure. The films, obtained with these deposition conditions, showed good adhesion to silicon substrates.

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Section: Introductionmentioning

confidence: 99%

Influence of deposition parameters on mechanical properties of sputter-deposited Cr₂O₃ thin films

1999

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“…The information extracted from the indentation test can be used to determine the effective modulus of elasticity, * , using the following semi-empirical relation established by Loubet (Loubet, Georges, Marchesini, & Meille, 1984) as presented in Equation 2. * = 1 2 √…”

Section: Elastic Modulusmentioning

confidence: 99%

Eco-bricks: a sustainable substitute for construction materials

Antico

Wiener

Araya-Letelier

et al. 2017

rdlc

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Eco-bricks, polyethylene terephthalate (PET) bottles filled with mixed inorganic waste, have become a low cost construction material and a valid recycling method to reduce waste disposal in regions where industrial recycling is not yet available. Because Eco-bricks are filled with mixed recovered materials, potential recycling of its constituents is difficult at the end of its life. This study proposes considering Eco-bricks filled with a single inorganic waste material to work as a time capsule, with potential for recovering the filling material when other ways of waste valorization are available within those communities that currently have no better recycling options. This paper develops an experimental characterization of density, filler content (by volume), thermal shrinkage, elastic modulus and deformation recovery capacity using four different filler materials: 1) PET; 2) paper & cardboard; 3) tetrapack; and 4) metal. Overall, Eco-brick's density, thermal shrinkage and elastic modulus are dependent on the filler content. Density and elastic modulus of the proposed Eco-bricks are similar to values of medium-high density expanded polystyrene (EPS) used in nonstructural construction, reason why we suggest that these Eco-bricks might be a sustainable alternative to EPS or other nonstructural construction materials.Key words: Eco-bricks; inorganic solid waste valorization; physical characterization; elastic modulus; nonstructural materials. ResumenLos Eco-ladrillos, botellas de politereftalato de etileno (PET, por sus siglas en inglés) rellenas con residuos inorgánicos, se han convertido en un material de construcción de bajo costo y un método válido de reciclaje para reducir la disposición de basura en regiones donde el reciclaje industrial no está aún disponible. Debido a que los Eco-ladrillos son rellenados con materiales reciclados combinados, se reduce el potencial de reciclaje de sus constituyentes al finalizar su vida útil. Este estudio propone crear Eco-ladrillos rellenados con un solo tipo de deshecho inorgánico para funcionar como cápsulas del tiempo con potencial de recuperar el material de relleno cuando otras formas de valorización de deshechos estén disponibles entre las comunidades que actualmente no tienen mejores opciones de reciclaje. El presente trabajo consiste en una caracterización experimental de densidad, volumen de llenado, contracción térmica, módulo elástico y capacidad de recuperación de su deformación, considerando cuatro materiales de relleno diferentes: a) PET; b) papel & cartón; c) tetrapack; y 4) metal. En general, la densidad, contracción térmica y módulo de elasticidad de los Eco-ladrillos depende del volumen de llenado. La densidad y módulo de elasticidad de los Eco-ladrillos propuestos son similares a los valores de poliestireno expandido (EPS, por sus siglas en inglés) de densidades medias-altas usados en construcción no estructural, razón por lo cual sugerimos que estos Eco-ladrillos pueden ser una alternativa sustentable al EPS u otros materiales de construcción n...

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“…Instrumented indentation tests for measuring mechanical properties of materials on small scales have been widely used for more than two decades, [1][2][3] and other than hardness, Young's modulus is an important material property determinable with this technique. Using the well-known relationship among reduced Young's modulus, initial unloading stiffness and contact area, Oliver and Pharr [4][5][6] developed a classic method for Young's modulus measurement.…”

Section: Introductionmentioning

confidence: 99%

Further analysis of energy-based indentation relationship among Young’s modulus, nominal hardness, and indentation work

Ma¹,

Ong

2010

J. Mater. Res.

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In our previous study, we modeled the indentation performed on an elastic-plastic solid with a rigid conical indenter by using finite element analysis, and established a relationship between a nominal hardness/reduced Young's modulus (H n /E r ) and unloading work/total indentation work (W e /W t ). The elasticity of the indenter was absorbed in, where E i and n i are the Young's modulus and Poisson's ratio of the indenter, and E and n are those of the indented material. However, recalculation by directly introducing the elasticity of the indenter show that the use of E r alone cannot accurately reflect the combined elastic effect of the indenter and indented material, but the ratio2 )] would influence the H n /E r -W e /W t relationship. Thereby, we replaced E r with a combined Young's modulus, and found that the approximate H n /E c -W e /W t relationship is almost independent of selected Z values over 0-0.3834, which can be used to give good estimates of E as verified by experimental results.

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Vickers Indentation Curves of Magnesium Oxide (MgO)

Cited by 378 publications

References 0 publications

Influence of deposition parameters on mechanical properties of sputter-deposited Cr₂O₃ thin films

Influence of deposition parameters on mechanical properties of sputter-deposited Cr₂O₃ thin films

Eco-bricks: a sustainable substitute for construction materials

Further analysis of energy-based indentation relationship among Young’s modulus, nominal hardness, and indentation work

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Vickers Indentation Curves of Magnesium Oxide (MgO)

Cited by 378 publications

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Influence of deposition parameters on mechanical properties of sputter-deposited Cr2O3 thin films

Influence of deposition parameters on mechanical properties of sputter-deposited Cr2O3 thin films

Eco-bricks: a sustainable substitute for construction materials

Further analysis of energy-based indentation relationship among Young’s modulus, nominal hardness, and indentation work

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Influence of deposition parameters on mechanical properties of sputter-deposited Cr₂O₃ thin films

Influence of deposition parameters on mechanical properties of sputter-deposited Cr₂O₃ thin films